如何读取不同目录下的txt文件内容并根据重命名其他文件

How read contents of txt files in different directories and rename other files according to

我刚开始用 Python 3 和 运行 解决了以下问题:

我为我的论文从不同的期刊下载了大量的 PDF,但它们都是以他们的 DOI 命名的,而不是“作者(年份)- 标题”的格式。 文献根据期刊名称和卷数分别保存在不同的目录中,例如:

/Journal 1/
    /Vol. 1/
        file1.pdf
        file1.txt
        file2.pdf
        file2.txt
        filen.pdf
        filen.txt
    /Vol. 2/
        file1.pdf
        file1.txt
/Journal 2/
    ...

因为我不知道如何使用 Python 阅读 PDF 的内容,我写了一个非常短的 bash 脚本,将 PDF 转换为简单的 TXT 文件。 pdf 和 txt 文件具有相同的名称,但文件扩展名不同。

我想重命名所有的 PDF 文件,幸运的是每个文件的连续文本中都有一个字符串,我可以使用。此可变字符串位于两个静态字符串之间:

"Cite this article as: " AUTHOR/YEAR/TITLE ", Journal name". 

如何让 Python 进入每个目录,读取 TXT/PDF 的内容,提取两个固定字符串之间的可变字符串,然后重命名适当的 PDF 文件?

如果有人知道如何用 Python 3 做到这一点,我将不胜感激。

终于开始工作了:

#__author__ = 'Telefonmann'
# -*- coding: utf-8 -*-

import os, re, ntpath, shutil

for root, dirs, files in os.walk(os.getcwd()):
    for file in files: # loops through directories and files
        if file.endswith(('.txt')): # only processes txt files
            full_path = ntpath.splitdrive(ntpath.join(root, file))[1]
            # builds correct path under Win 7 (and probably other NT-systems

            with open(full_path, 'r', encoding='utf-8') as f:
                content = f.read().replace('\n', '') # remove newline

                r = re.compile('To\s*cite\s*this\s*article:\s*(.*?),\s*Journal\s*of\s*Quantitative\s*Linguistics\s*,')
                m = r.search(content)
                # finds substring inbetween "To cite this article: " and "Journal of Quantitative Linguistics,"
                # also finds typos like "Journal ofQuantitative ..."

                if m:
                    full_title = m.group(1)

            print("full_title: {0}".format(full_title))
            full_title = (full_title.replace('<','') # removes/replaces forbidden characters in Windows file names
                .replace('>','')
                .replace(':',' -')
                .replace('"','')
                .replace('/','')
                .replace('\','')
                .replace('|','')
                .replace('?','')
                .replace('*',''))

            pdf_name = full_path.replace('txt','pdf')
            # since txt and pdf files only differ in their format extension I simply replace .txt with .pdf
            # to get the right name

            print('File: '+ file)
            print('Full Path: ' + full_path)
            print('Full Title: ' + full_title)
            print('PDF Name: ' + pdf_name)
            print('....................................')
            # for trouble shooting

            dirname = ntpath.dirname(pdf_name)
            new_path = ntpath.join(dirname, "{0}.pdf".format(full_title))

            if ntpath.exists(full_path):
                print("all paths found")
                shutil.copy(pdf_name, new_path)
                # makes a copy of the pdf file with the new name in the respective directory